Table 2.

Steepest ascent experiment of AAO pretreatment

Runs	X 1	X 2	X 3	Delignification (%)
	Time (h)	Acetic acid (%)	H2SO4 addition (%)
1	1.3	40	0.45	23.2
2	1.4	45	0.51	37.7
3	1.6	50	0.58	60.1
4	1.8	55	0.64	64.1
5	2.0	60	0.70	66.3
6	2.2	65	0.76	67.3
7	2.4	70	0.83	68.3